These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
Mr Navalny, 41, was widely regarded as the only candidate with a chance of challenging President Vladimir Putin. We're declaring a strike by voters. The procedure that we're invited to take part is not an election, Mr Navalny said after the decision, adding that he would lead protests across the country.